docs: update README with repo URL, add setup guide and .gitignore

- Update README installation to use uv tool install with self-hosted repo URL
- Add docs/SETUP.md for AI agent consumption
- Add .gitignore for __pycache__, build artifacts, venv, IDE files
- Remove obsolete superpowers planning docs

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

README.md

@@ -2,6 +2,8 @@
 
 HTTP proxy for Gitea LFS -- rewrites Host header to bypass ICP domain blocking.
 
+**Repository:** `ssh://git@git.zz.com:2222/Developer/jianda-proxy.git`
+
 ## Background
 
 Internal Gitea is exposed via a reverse tunnel on a Tencent Cloud server. The client resolves the domain via `hosts` file to the cloud IP. SSH clone works fine, but LFS file downloads go over HTTP. Tencent Cloud detects the unregistered domain from the Host header and blocks the request with a 302 redirect.
@@ -11,11 +13,7 @@ This proxy rewrites the Host header on all requests to the upstream IP address,
 ## Installation
 
 ```bash
-# Install as a global CLI tool (recommended)
-uv tool install .
-
-# Or with pip
-pip install .
+uv tool install git+ssh://git@git.zz.com:2222/Developer/jianda-proxy.git
 ```
 
 ## CLI Commands
@@ -92,7 +90,7 @@ git config --global http.http://git.zz.com:3000/.proxy http://127.0.0.1:13000
 3. Clone as usual:
 
 ```bash
-git clone ssh://git@git.zz.com:2222/your-repo.git
+git clone ssh://git@git.zz.com:2222/Developer/jianda-proxy.git
 ```
 
 LFS downloads will be routed through the proxy transparently.